/**
* Execute cron tasks
*/
function cron_run()
{
global $DB, $CFG, $OUTPUT;
if (CLI_MAINTENANCE) {
echo "CLI maintenance mode active, cron execution suspended.\n";
exit(1);
}
if (moodle_needs_upgrading()) {
echo "Moodle upgrade pending, cron execution suspended.\n";
exit(1);
}
require_once $CFG->libdir . '/adminlib.php';
if (!empty($CFG->showcronsql)) {
$DB->set_debug(true);
}
if (!empty($CFG->showcrondebugging)) {
set_debugging(DEBUG_DEVELOPER, true);
}
core_php_time_limit::raise();
$starttime = microtime();
// Increase memory limit
raise_memory_limit(MEMORY_EXTRA);
// Emulate normal session - we use admin accoutn by default
cron_setup_user();
// Start output log
$timenow = time();
mtrace("Server Time: " . date('r', $timenow) . "\n\n");
// Run all scheduled tasks.
while (!\core\task\manager::static_caches_cleared_since($timenow) && ($task = \core\task\manager::get_next_scheduled_task($timenow))) {
mtrace("Execute scheduled task: " . $task->get_name());
cron_trace_time_and_memory();
$predbqueries = null;
$predbqueries = $DB->perf_get_queries();
$pretime = microtime(1);
try {
get_mailer('buffer');
$task->execute();
if ($DB->is_transaction_started()) {
throw new coding_exception("Task left transaction open");
}
if (isset($predbqueries)) {
mtrace("... used " . ($DB->perf_get_queries() - $predbqueries) . " dbqueries");
mtrace("... used " . (microtime(1) - $pretime) . " seconds");
}
mtrace("Scheduled task complete: " . $task->get_name());
\core\task\manager::scheduled_task_complete($task);
} catch (Exception $e) {
if ($DB && $DB->is_transaction_started()) {
error_log('Database transaction aborted automatically in ' . get_class($task));
$DB->force_transaction_rollback();
}
if (isset($predbqueries)) {
mtrace("... used " . ($DB->perf_get_queries() - $predbqueries) . " dbqueries");
mtrace("... used " . (microtime(1) - $pretime) . " seconds");
}
mtrace("Scheduled task failed: " . $task->get_name() . "," . $e->getMessage());
if ($CFG->debugdeveloper) {
if (!empty($e->debuginfo)) {
mtrace("Debug info:");
mtrace($e->debuginfo);
}
mtrace("Backtrace:");
mtrace(format_backtrace($e->getTrace(), true));
}
\core\task\manager::scheduled_task_failed($task);
}
get_mailer('close');
unset($task);
}
// Run all adhoc tasks.
while (!\core\task\manager::static_caches_cleared_since($timenow) && ($task = \core\task\manager::get_next_adhoc_task($timenow))) {
mtrace("Execute adhoc task: " . get_class($task));
cron_trace_time_and_memory();
$predbqueries = null;
$predbqueries = $DB->perf_get_queries();
$pretime = microtime(1);
try {
get_mailer('buffer');
$task->execute();
if ($DB->is_transaction_started()) {
throw new coding_exception("Task left transaction open");
}
if (isset($predbqueries)) {
mtrace("... used " . ($DB->perf_get_queries() - $predbqueries) . " dbqueries");
mtrace("... used " . (microtime(1) - $pretime) . " seconds");
}
mtrace("Adhoc task complete: " . get_class($task));
\core\task\manager::adhoc_task_complete($task);
} catch (Exception $e) {
if ($DB && $DB->is_transaction_started()) {
error_log('Database transaction aborted automatically in ' . get_class($task));
$DB->force_transaction_rollback();
}
if (isset($predbqueries)) {
mtrace("... used " . ($DB->perf_get_queries() - $predbqueries) . " dbqueries");
mtrace("... used " . (microtime(1) - $pretime) . " seconds");
}
mtrace("Adhoc task failed: " . get_class($task) . "," . $e->getMessage());
if ($CFG->debugdeveloper) {
if (!empty($e->debuginfo)) {
mtrace("Debug info:");
mtrace($e->debuginfo);
}
mtrace("Backtrace:");
mtrace(format_backtrace($e->getTrace(), true));
}
\core\task\manager::adhoc_task_failed($task);
}
get_mailer('close');
unset($task);
}
mtrace("Cron script completed correctly");
gc_collect_cycles();
mtrace('Cron completed at ' . date('H:i:s') . '. Memory used ' . display_size(memory_get_usage()) . '.');
$difftime = microtime_diff($starttime, microtime());
mtrace("Execution took " . $difftime . " seconds");
}
